Re: Side-by-side source/assembly views?
Re: Side-by-side source/assembly views?
- Subject: Re: Side-by-side source/assembly views?
- From: Tom Seddon <email@hidden>
- Date: Wed, 10 Feb 2016 15:09:38 +0000
Unless clang's asm output directives have changed substantially
since I wrote it, my improve-xcode-asm-output script should work:
https://github.com/tom-seddon/bin/blob/master/improve-xcode-asm-output.py
Documentation, also found in the README in the repo:
Takes asm output from Xcode on stdin, and prints it to stdout,
only with .loc directives replaced with the actual
lines from the original source code. This is what Visual C++
does, and it’s very handy…
(To get asm output from Xcode, click the button at the top left
of the text edit window - it looks like a little 4x2 grid, I’ve
no idea what it’s supposed to be - and select Assembly
from the menu.)
You can copy the result from Xcode and use pbpaste
to pipe it through improve-xcode-asm-output, e.g.:
pbpaste | ./improve-xcode-asm-output.py
--Tom
On 09/02/2016 19:18, Jens Alfke wrote:
One nice feature of Instruments is its side-by-side display of source code next to assembly code. This is a great help when trying to figure out what the compiled code for a function or a line of code looks like.
Is there any way to get something like that when not using Instruments? Right now I’m looking at the Assembly assistant view in Xcode, which is really hard to work with — I have to search through the huge output to find the function I want, and the listing is full of jump labels and assembler directives that make it hard to pick out the actual instructions.
I’d even be happy to have a shellscript that would post-process the assembly and output a more readable form. (Which yeah, I could write myself, but I’d rather spend that hour debugging my current crasher, not remembering how sed works.)
—Jens
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